Dibstocic



L. RUMAGE.

DIESTOCK.

APPLICATION FILED FEB. '10, |919.

'Patented Nov. 25, 1919.

L aufs .EL/M455 Guan, S

lnur

"raras IOUIS'RUMAGE, 0F LAKEWOOD, Oli-H0.A

DIESTOCK.

neeaeas.

Specification of Letters Patent.

raten-teu Nov. 25, reis.

Application filed February 10, 1919. Serial No. 276,020.

. zen of the United States, residing at Lakewood, inthe county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Diestocks, of which the following is a specification.

This invention relates to a die stock, and the object of the invention is to provide a simple and very compact die stock adapted to hold a plural numberl of cutting or screwthreading dies inv staggered overlapping relation on opposite sides of a longitudinal median line of the die stock, and a further object is to provide separate removable and interchangeable centering bearings opposite each die within which the work may be supported centrally in line with the die, all substantially as hereinafter shown and described and more. particularly pointed out in the claims.

In the accompanying drawings, Figure l is a perspective View of a locking plate, and Fig. 2 a similar view of the body of my improved die stock. Fig. 3 is a horizontal section in plan of the die stock, showing one die mounted therein and engaged with a piece of pipe. Fig. 4 is a transverse section of a die stock taken on a center line through one of the compartments with the die re-y moved and showing a centering plate secured to the outside thereof. Fig. 5 is a perspective view of one of the dies, and Fig. 6 is a side view of a split ring which may be used to support and center the work. Fig. 7 is a perspective view of a different form of centering device for the work.

The die stock comprises a hollow rectangular body 2 cast of steel or an annealed metal and this body is divided transversely by a pair of walls 3 into three separate com.- partments which are all open top and bottom and further divided on the longitudinal median line of the body into separate communicating spaces or pockets 4 and 5 of different size. Each larger pocket 4 is adapted to hold a square cutting or screw-threading die 3 when inserted either through the open top or open bottom, and this can be done only when one or the other of a pair of fastening bars 4 is shifted or removed from its central spanning relation across the several compartments on the longitudinal center line of the tool. Bars 4 overlap the dies and lock them in place, and the opposite ends of the bars are `secured by screws to the opposite ends of body 2.

The present device shows three compartments, one on the transverse center line of the tool and a compartment at each end of the body; and the die pockets 4 for the end compartments are located at one and the same side of the body, whereasthe central die pocket 4 is located on the opposite side of the body in staggered relation to the end pockets. the dies overlap, that-is the two end compartments are placed relatively as near to the transverse center of the middle compartment as possible, but with a-space between the inner walls 3 to accommodate the work introduced through the center opening 7 of the wall on one side of the body. A second opening 7 of larger diameter is also provided in the opposite side wall of the body adjacent the center die 4 to permit the work to project through the die in cutting operations. A support to center the work is also provided at the mouth of opening 7, and in Figs. 3 and 6 I show a split ring 8 for that purpose adapted to be removably seated and engaged with the edge of said opening. However, I may use a center guide and support such as shown in Figs. 4 and 7, comprising a flanged plate 9 having a round opening and ears 10 adapted to be secured by screws at the side of bodj7 2. These supporting devices are removable and interchangeable and of different sizes to accommodate pipe of different diameter, and each one of the die pockets has such a centering Vring or plate secured in the smaller opening in the side walls adjacent the larger opening in the opposite wall through which the work is inserted.

The respective pockets for the dies have flatsided walls so that the dies may fit snugly therein and the inner walls for the three dies are formed in part by an angle or of-set-portion 11 in cross walls 3, and in part by a short inwardly projecting flange 12 at each end of the body. Said angular portions 11 and flanges 12 are located on the longitudinal and median line of the tool.

The construction of body 2 as described permits the die with the largest die-threading opening, that is, the die which hasthe heaviest work to perform, to be placed in the center pocket, and the openings 7-7 in the -Center are of corresponding size.

Moreover, the three pockets for* The other diesare off-center, but because the pockets for the dies overlap the oit-cen- Y ter distance is reduced to a minimunr and the tool as a. Whole. is vcompact and still fairly Well balanced and can be turned with the saine facility as if on the exact transverse center o' the body. Each die is also adjacent an open space `(space 5) in the body, which space is open top and' bottoni for the free discharge of chips, and the pipe and dies niayalso be observed and reached through these spaces and oil applied Where needed.

lengthwise thereof and means to secure screw threading dies in said pockets. n

2.' A die stock provided with a body having a rectangular pocket for a separate screw threadingdiecentrally at one side of Y the median line lengthwise thereof, and po'cketson the opposite side of said median line at each side of the center of the stock. o 3. A die stock, comprising a compartinented body having die-holding pockets in staggered and overlapping relation. 4L. A die stock, comprising a rectangular body having a central `die pocket at one side of the longitudinal median line thereof and separate die-pockets-on the opposite side of the longitudinal median'line and in overlapping relation to said central pocket.

5. A die lstocl, cornprising an open rectangular body having spaced. division Walls With angular oil'sets providing-separate die pockets on oppositeJ sides ofthe longitudi-Y nal median line of the body.

Signed 'at' Cleveland, in the coun y of Cuyahoga, and Stateof Ohio, this 7th day of February, 1919. y

Louis RUMAGE. 

